Lamp



FIG. 1 is a perspective view of a lamp showing my new design;

FIG. 2 is a front view thereof, a rear view being a mirror image thereof;

FIG. 3 is a left side elevational view thereof, a right side elevational view being a mirror image thereof;

FIG. 4 is a top plan elevational view thereof; and,

FIG. 5 is a bottom plan elevational view thereof.

The broken line disclosure represents a portion of the article which forms no part of the claimed design. 

CLAIM The ornamental design for a lamp, as shown and described. 